. >>> in san francisco, voters are selecting several ballot measures, david stevenson is at city hall with the preparation for tonight's vote count. david. >> frank, yes, a number of ballot measures that san franciscoians will have to vote for still a 50 minute wait to get into city hall here and vote. take a look at the video we shot earlier. turnout is expected to be strong but may fall below the standard 71 turnout for presidential elections in the city. the elections department is trying something new by releasing preliminary hearing results on voting which by midnight will give voters and supervisors in two crowded races the idea of a winner. provisional voting by mail is important with 262,000 ballots mailed out and 131,000 returned as of today. >> there has been a lot of dropping off of ballots i think at the polling places. and that's one thing that we really can't track. there's no number for that. i think that's one of the missing factors tore turnout. >> again we are seeing it get busy in city hall. a lot of the groups are starting to fill up more so than this afternoon whe